Whitney is a Yonkers resident, and the Majors' listed address is on the sixth floor of the seven-story building at 100 Manhattan Ave., where Smith was shot to death in a sixth-floor stairwell on Aug. 17, Greenburgh police said.

Police said they responded around 8 that night to a report of shots fired, and found Smith, 46, with a gunshot wound to his chest. He was rushed to Westchester Medical Center, where he was pronounced dead.

Officers found a gun at the Majors' apartment after obtaining a search warrant, police said, and all three teenagers were arrested on Aug. 18.

Whitney and Vance Major are being held without bail at the Westchester County jail. It is unclear if Trevon Major is still in custody.

Trevon Major faces felony charges of first-degree manslaughter, two counts of second-degree criminal possession of a weapon, criminal possession of a firearm, tampering with physical evidence and second-degree hindering prosecution.

Vance Major and Whitney face two counts of first-degree robbery, second-degree robbery, second-degree criminal possession of a weapon, second-degree hindering prosecution and tampering with physical evidence, all felonies. Major is also charged with criminal possession of a firearm, and Whitney is also charged with a second count of second-degree criminal possession of a weapon.

In March Whitney pleaded guilty to fourth-degree conspiracy, a felony, after initially being charged with first-degree robbery for an incident that occurred in Yonkers in 2015, court records show. He was sentenced to five years of probation.